<?php
// +----------------------------------------------------------------------
// | ThinkPHP [ WE CAN DO IT JUST THINK IT ]
// +----------------------------------------------------------------------
// | Copyright (c) 2006-2012 http://thinkphp.cn All rights reserved.
// +----------------------------------------------------------------------
// | Licensed ( http://www.apache.org/licenses/LICENSE-2.0 )
// +----------------------------------------------------------------------
// | Author: luofei614 <www.3g4k.com>
// +----------------------------------------------------------------------
// $Id$

/**
 +------------------------------------------------------------------------------
 * 将Trace信息输出到火狐的firebug，从而不影响ajax效果和页面的布局。
 +------------------------------------------------------------------------------
 * 使用前，你需要先在火狐浏览器上安装firebug和firePHP两个插件。
 * 定义项目的tags.php文件，
 * <code>
 * <?php return array(
 *   'view_end'=>array(
 *       'FireShowPageTrace'
 *   )
 * );
 * </code>
 * 再将此文件放到项目的Behavior文件夹中即可
 * 如果trace信息没有正常输出，请查看您的日志。
 * firePHP，是通过http headers和firebug通讯的，所以要保证在输出trace信息之前不能有
 * headers输出，你可以在入口文件第一行加入代码 ob_start(); 或者配置output_buffering
 *
 */

defined('THINK_PATH') or exit();
/**
 +------------------------------------------------------------------------------
 * 系统行为扩展 页面Trace显示输出
 +------------------------------------------------------------------------------
 */
class FireShowPageTraceBehavior extends Behavior {
	// 行为参数定义
	protected $options   =  array(
        'FIRE_SHOW_PAGE_TRACE'=> true,   // 显示页面Trace信息
        'TRACE_PAGE_TABS'=> array('BASE'=>'基本','FILE'=>'文件','INFO'=>'流程','ERR|NOTIC'=>'错误','SQL'=>'SQL','DEBUG'=>'调试')
	);

	// 行为扩展的执行入口必须是run
	public function run(&$params){
		if(C('FIRE_SHOW_PAGE_TRACE')) $this->showTrace();
	}

	/**
	 +----------------------------------------------------------
	 * 显示页面Trace信息
	 +----------------------------------------------------------
	 * @access private
	 +----------------------------------------------------------
	 */
	private function showTrace() {
		// 系统默认显示信息
		$files =  get_included_files();
		$info   =   array();
		foreach ($files as $key=>$file){
			$info[] = $file.' ( '.number_format(filesize($file)/1024,2).' KB )';
		}
		$trace  =   array();
		$base   =   array(
            '请求信息'=>  date('Y-m-d H:i:s',$_SERVER['REQUEST_TIME']).' '.$_SERVER['SERVER_PROTOCOL'].' '.$_SERVER['REQUEST_METHOD'].' : '.__SELF__,
            '运行时间'=> $this->showTime(),
            '内存开销'=> MEMORY_LIMIT_ON?number_format((memory_get_usage() - $GLOBALS['_startUseMems'])/1024,2).' kb':'不支持',
            '查询信息'=> N('db_query').' queries '.N('db_write').' writes ',
            '文件加载'=> count(get_included_files()),
            '缓存信息'=> N('cache_read').' gets '.N('cache_write').' writes ',
            '配置加载'=> count(c()),
            '会话信息'=> 'SESSION_ID='.session_id(),
		);
		// 读取项目定义的Trace文件
		$traceFile  =   CONF_PATH.'trace.php';
		if(is_file($traceFile)) {
			$base    =   array_merge($base,include $traceFile);
		}
		$debug  =   trace();
		$tabs   =   C('TRACE_PAGE_TABS');
		foreach ($tabs as $name=>$title){
			switch(strtoupper($name)) {
				case 'BASE':// 基本信息
					$trace[$title]  =   $base;
					break;
				case 'FILE': // 文件信息
					$trace[$title]  =   $info;
					break;
				default:// 调试信息
					if(strpos($name,'|')) {// 多组信息
						$array  =   explode('|',$name);
						$result =   array();
						foreach($array as $name){
							$result   +=   isset($debug[$name])?$debug[$name]:array();
						}
						$trace[$title]  =   $result;
					}else{
						$trace[$title]  =   isset($debug[$name])?$debug[$name]:'';
					}
			}
		}
		foreach ($trace as $key=>$val){
			if(!is_array($val) && empty($val))
			$val=array();
			if(is_array($val)){
				$fire=array(
				array('','')
				);
				foreach($val as $k=>$v){
					$fire[]=array($k,$v);
				}
				fb(array($key,$fire),FirePHP::TABLE);
			}else{
				fb($val,$key);
			}
		}
		unset($files,$info,$log,$base);
	}

	/**
	 +----------------------------------------------------------
	 * 获取运行时间
	 +----------------------------------------------------------
	 */
	private function showTime() {
		// 显示运行时间
		G('beginTime',$GLOBALS['_beginTime']);
		G('viewEndTime');
		// 显示详细运行时间
		return G('beginTime','viewEndTime').'s ( Load:'.G('beginTime','loadTime').'s Init:'.G('loadTime','initTime').'s Exec:'.G('initTime','viewStartTime').'s Template:'.G('viewStartTime','viewEndTime').'s )';
	}

}


function fb()
{
	$instance = FirePHP::getInstance(true);

	$args = func_get_args();
	return call_user_func_array(array($instance,'fb'),$args);
}


class FB
{
	/**
	 * Enable and disable logging to Firebug
	 *
	 * @see FirePHP->setEnabled()
	 * @param boolean $Enabled TRUE to enable, FALSE to disable
	 * @return void
	 */
	public static function setEnabled($Enabled)
	{
		$instance = FirePHP::getInstance(true);
		$instance->setEnabled($Enabled);
	}

	/**
	 * Check if logging is enabled
	 *
	 * @see FirePHP->getEnabled()
	 * @return boolean TRUE if enabled
	 */
	public static function getEnabled()
	{
		$instance = FirePHP::getInstance(true);
		return $instance->getEnabled();
	}

	/**
	 * Specify a filter to be used when encoding an object
	 *
	 * Filters are used to exclude object members.
	 *
	 * @see FirePHP->setObjectFilter()
	 * @param string $Class The class name of the object
	 * @param array $Filter An array or members to exclude
	 * @return void
	 */
	public static function setObjectFilter($Class, $Filter)
	{
		$instance = FirePHP::getInstance(true);
		$instance->setObjectFilter($Class, $Filter);
	}

	/**
	 * Set some options for the library
	 *
	 * @see FirePHP->setOptions()
	 * @param array $Options The options to be set
	 * @return void
	 */
	public static function setOptions($Options)
	{
		$instance = FirePHP::getInstance(true);
		$instance->setOptions($Options);
	}

	/**
	 * Get options for the library
	 *
	 * @see FirePHP->getOptions()
	 * @return array The options
	 */
	public static function getOptions()
	{
		$instance = FirePHP::getInstance(true);
		return $instance->getOptions();
	}

	/**
	 * Log object to firebug
	 *
	 * @see http://www.firephp.org/Wiki/Reference/Fb
	 * @param mixed $Object
	 * @return true
	 * @throws Exception
	 */
	public static function send()
	{
		$instance = FirePHP::getInstance(true);
		$args = func_get_args();
		return call_user_func_array(array($instance,'fb'),$args);
	}

	/**
	 * Start a group for following messages
	 *
	 * Options:
	 *   Collapsed: [true|false]
	 *   Color:     [#RRGGBB|ColorName]
	 *
	 * @param string $Name
	 * @param array $Options OPTIONAL Instructions on how to log the group
	 * @return true
	 */
	public static function group($Name, $Options=null)
	{
		$instance = FirePHP::getInstance(true);
		return $instance->group($Name, $Options);
	}

	/**
	 * Ends a group you have started before
	 *
	 * @return true
	 * @throws Exception
	 */
	public static function groupEnd()
	{
		return self::send(null, null, FirePHP::GROUP_END);
	}

	/**
	 * Log object with label to firebug console
	 *
	 * @see FirePHP::LOG
	 * @param mixes $Object
	 * @param string $Label
	 * @return true
	 * @throws Exception
	 */
	public static function log($Object, $Label=null)
	{
		return self::send($Object, $Label, FirePHP::LOG);
	}

	/**
	 * Log object with label to firebug console
	 *
	 * @see FirePHP::INFO
	 * @param mixes $Object
	 * @param string $Label
	 * @return true
	 * @throws Exception
	 */
	public static function info($Object, $Label=null)
	{
		return self::send($Object, $Label, FirePHP::INFO);
	}

	/**
	 * Log object with label to firebug console
	 *
	 * @see FirePHP::WARN
	 * @param mixes $Object
	 * @param string $Label
	 * @return true
	 * @throws Exception
	 */
	public static function warn($Object, $Label=null)
	{
		return self::send($Object, $Label, FirePHP::WARN);
	}

	/**
	 * Log object with label to firebug console
	 *
	 * @see FirePHP::ERROR
	 * @param mixes $Object
	 * @param string $Label
	 * @return true
	 * @throws Exception
	 */
	public static function error($Object, $Label=null)
	{
		return self::send($Object, $Label, FirePHP::ERROR);
	}

	/**
	 * Dumps key and variable to firebug server panel
	 *
	 * @see FirePHP::DUMP
	 * @param string $Key
	 * @param mixed $Variable
	 * @return true
	 * @throws Exception
	 */
	public static function dump($Key, $Variable)
	{
		return self::send($Variable, $Key, FirePHP::DUMP);
	}

	/**
	 * Log a trace in the firebug console
	 *
	 * @see FirePHP::TRACE
	 * @param string $Label
	 * @return true
	 * @throws Exception
	 */
	public static function trace($Label)
	{
		return self::send($Label, FirePHP::TRACE);
	}

	/**
	 * Log a table in the firebug console
	 *
	 * @see FirePHP::TABLE
	 * @param string $Label
	 * @param string $Table
	 * @return true
	 * @throws Exception
	 */
	public static function table($Label, $Table)
	{
		return self::send($Table, $Label, FirePHP::TABLE);
	}

}

if (!defined('E_STRICT')) {
	define('E_STRICT', 2048);
}
if (!defined('E_RECOVERABLE_ERROR')) {
	define('E_RECOVERABLE_ERROR', 4096);
}
if (!defined('E_DEPRECATED')) {
	define('E_DEPRECATED', 8192);
}
if (!defined('E_USER_DEPRECATED')) {
	define('E_USER_DEPRECATED', 16384);
}

/**
 * Sends the given data to the FirePHP Firefox Extension.
 * The data can be displayed in the Firebug Console or in the
 * "Server" request tab.
 *
 * For more information see: http://www.firephp.org/
 *
 * @copyright       Copyright (C) 2007-2009 Christoph Dorn
 * @author          Christoph Dorn <christoph@christophdorn.com>
 * @license         http://www.opensource.org/licenses/bsd-license.php
 * @package         FirePHPCore
 */
class FirePHP {

	/**
	 * FirePHP version
	 *
	 * @var string
	 */
	const VERSION = '0.3';    // @pinf replace '0.3' with '%%package.version%%'

	/**
	 * Firebug LOG level
	 *
	 * Logs a message to firebug console.
	 *
	 * @var string
	 */
	const LOG = 'LOG';

	/**
	 * Firebug INFO level
	 *
	 * Logs a message to firebug console and displays an info icon before the message.
	 *
	 * @var string
	 */
	const INFO = 'INFO';

	/**
	 * Firebug WARN level
	 *
	 * Logs a message to firebug console, displays an warning icon before the message and colors the line turquoise.
	 *
	 * @var string
	 */
	const WARN = 'WARN';

	/**
	 * Firebug ERROR level
	 *
	 * Logs a message to firebug console, displays an error icon before the message and colors the line yellow. Also increments the firebug error count.
	 *
	 * @var string
	 */
	const ERROR = 'ERROR';

	/**
	 * Dumps a variable to firebug's server panel
	 *
	 * @var string
	 */
	const DUMP = 'DUMP';

	/**
	 * Displays a stack trace in firebug console
	 *
	 * @var string
	 */
	const TRACE = 'TRACE';

	/**
	 * Displays an exception in firebug console
	 *
	 * Increments the firebug error count.
	 *
	 * @var string
	 */
	const EXCEPTION = 'EXCEPTION';

	/**
	 * Displays an table in firebug console
	 *
	 * @var string
	 */
	const TABLE = 'TABLE';

	/**
	 * Starts a group in firebug console
	 *
	 * @var string
	 */
	const GROUP_START = 'GROUP_START';

	/**
	 * Ends a group in firebug console
	 *
	 * @var string
	 */
	const GROUP_END = 'GROUP_END';

	/**
	 * Singleton instance of FirePHP
	 *
	 * @var FirePHP
	 */
	protected static $instance = null;

	/**
	 * Flag whether we are logging from within the exception handler
	 *
	 * @var boolean
	 */
	protected $inExceptionHandler = false;

	/**
	 * Flag whether to throw PHP errors that have been converted to ErrorExceptions
	 *
	 * @var boolean
	 */
	protected $throwErrorExceptions = true;

	/**
	 * Flag whether to convert PHP assertion errors to Exceptions
	 *
	 * @var boolean
	 */
	protected $convertAssertionErrorsToExceptions = true;

	/**
	 * Flag whether to throw PHP assertion errors that have been converted to Exceptions
	 *
	 * @var boolean
	 */
	protected $throwAssertionExceptions = false;

	/**
	 * Wildfire protocol message index
	 *
	 * @var int
	 */
	protected $messageIndex = 1;

	/**
	 * Options for the library
	 *
	 * @var array
	 */
	protected $options = array('maxDepth' => 10,
                               'maxObjectDepth' => 5,
                               'maxArrayDepth' => 5,
                               'useNativeJsonEncode' => true,
                               'includeLineNumbers' => true);

	/**
	 * Filters used to exclude object members when encoding
	 *
	 * @var array
	 */
	protected $objectFilters = array(
        'firephp' => array('objectStack', 'instance', 'json_objectStack'),
        'firephp_test_class' => array('objectStack', 'instance', 'json_objectStack')
	);

	/**
	 * A stack of objects used to detect recursion during object encoding
	 *
	 * @var object
	 */
	protected $objectStack = array();

	/**
	 * Flag to enable/disable logging
	 *
	 * @var boolean
	 */
	protected $enabled = true;

	/**
	 * The insight console to log to if applicable
	 *
	 * @var object
	 */
	protected $logToInsightConsole = null;

	/**
	 * When the object gets serialized only include specific object members.
	 *
	 * @return array
	 */
	public function __sleep()
	{
		return array('options','objectFilters','enabled');
	}

	/**
	 * Gets singleton instance of FirePHP
	 *
	 * @param boolean $AutoCreate
	 * @return FirePHP
	 */
	public static function getInstance($AutoCreate = false)
	{
		if ($AutoCreate===true && !self::$instance) {
			self::init();
		}
		return self::$instance;
	}

	/**
	 * Creates FirePHP object and stores it for singleton access
	 *
	 * @return FirePHP
	 */
	public static function init()
	{
		return self::setInstance(new self());
	}

	/**
	 * Set the instance of the FirePHP singleton
	 *
	 * @param FirePHP $instance The FirePHP object instance
	 * @return FirePHP
	 */
	public static function setInstance($instance)
	{
		return self::$instance = $instance;
	}

	/**
	 * Set an Insight console to direct all logging calls to
	 *
	 * @param object $console The console object to log to
	 * @return void
	 */
	public function setLogToInsightConsole($console)
	{
		if(is_string($console)) {
			if(get_class($this)!='FirePHP_Insight' && !is_subclass_of($this, 'FirePHP_Insight')) {
				throw new Exception('FirePHP instance not an instance or subclass of FirePHP_Insight!');
			}
			$this->logToInsightConsole = $this->to('request')->console($console);
		} else {
			$this->logToInsightConsole = $console;
		}
	}

	/**
	 * Enable and disable logging to Firebug
	 *
	 * @param boolean $Enabled TRUE to enable, FALSE to disable
	 * @return void
	 */
	public function setEnabled($Enabled)
	{
		$this->enabled = $Enabled;
	}

	/**
	 * Check if logging is enabled
	 *
	 * @return boolean TRUE if enabled
	 */
	public function getEnabled()
	{
		return $this->enabled;
	}

	/**
	 * Specify a filter to be used when encoding an object
	 *
	 * Filters are used to exclude object members.
	 *
	 * @param string $Class The class name of the object
	 * @param array $Filter An array of members to exclude
	 * @return void
	 */
	public function setObjectFilter($Class, $Filter)
	{
		$this->objectFilters[strtolower($Class)] = $Filter;
	}

	/**
	 * Set some options for the library
	 *
	 * Options:
	 *  - maxDepth: The maximum depth to traverse (default: 10)
	 *  - maxObjectDepth: The maximum depth to traverse objects (default: 5)
	 *  - maxArrayDepth: The maximum depth to traverse arrays (default: 5)
	 *  - useNativeJsonEncode: If true will use json_encode() (default: true)
	 *  - includeLineNumbers: If true will include line numbers and filenames (default: true)
	 *
	 * @param array $Options The options to be set
	 * @return void
	 */
	public function setOptions($Options)
	{
		$this->options = array_merge($this->options,$Options);
	}

	/**
	 * Get options from the library
	 *
	 * @return array The currently set options
	 */
	public function getOptions()
	{
		return $this->options;
	}

	/**
	 * Set an option for the library
	 *
	 * @param string $Name
	 * @param mixed $Value
	 * @throws Exception
	 * @return void
	 */
	public function setOption($Name, $Value)
	{
		if (!isset($this->options[$Name])) {
			throw $this->newException('Unknown option: ' . $Name);
		}
		$this->options[$Name] = $Value;
	}

	/**
	 * Get an option from the library
	 *
	 * @param string $Name
	 * @throws Exception
	 * @return mixed
	 */
	public function getOption($Name)
	{
		if (!isset($this->options[$Name])) {
			throw $this->newException('Unknown option: ' . $Name);
		}
		return $this->options[$Name];
	}

	/**
	 * Register FirePHP as your error handler
	 *
	 * Will throw exceptions for each php error.
	 *
	 * @return mixed Returns a string containing the previously defined error handler (if any)
	 */
	public function registerErrorHandler($throwErrorExceptions = false)
	{
		//NOTE: The following errors will not be caught by this error handler:
		//      E_ERROR, E_PARSE, E_CORE_ERROR,
		//      E_CORE_WARNING, E_COMPILE_ERROR,
		//      E_COMPILE_WARNING, E_STRICT

		$this->throwErrorExceptions = $throwErrorExceptions;

		return set_error_handler(array($this,'errorHandler'));
	}

	/**
	 * FirePHP's error handler
	 *
	 * Throws exception for each php error that will occur.
	 *
	 * @param int $errno
	 * @param string $errstr
	 * @param string $errfile
	 * @param int $errline
	 * @param array $errcontext
	 */
	public function errorHandler($errno, $errstr, $errfile, $errline, $errcontext)
	{
		// Don't throw exception if error reporting is switched off
		if (error_reporting() == 0) {
			return;
		}
		// Only throw exceptions for errors we are asking for
		if (error_reporting() & $errno) {

			$exception = new ErrorException($errstr, 0, $errno, $errfile, $errline);
			if ($this->throwErrorExceptions) {
				throw $exception;
			} else {
				$this->fb($exception);
			}
		}
	}

	/**
	 * Register FirePHP as your exception handler
	 *
	 * @return mixed Returns the name of the previously defined exception handler,
	 *               or NULL on error.
	 *               If no previous handler was defined, NULL is also returned.
	 */
	public function registerExceptionHandler()
	{
		return set_exception_handler(array($this,'exceptionHandler'));
	}

	/**
	 * FirePHP's exception handler
	 *
	 * Logs all exceptions to your firebug console and then stops the script.
	 *
	 * @param Exception $Exception
	 * @throws Exception
	 */
	function exceptionHandler($Exception)
	{

		$this->inExceptionHandler = true;

		header('HTTP/1.1 500 Internal Server Error');

		try {
			$this->fb($Exception);
		} catch (Exception $e) {
			echo 'We had an exception: ' . $e;
		}
		$this->inExceptionHandler = false;
	}

	/**
	 * Register FirePHP driver as your assert callback
	 *
	 * @param boolean $convertAssertionErrorsToExceptions
	 * @param boolean $throwAssertionExceptions
	 * @return mixed Returns the original setting or FALSE on errors
	 */
	public function registerAssertionHandler($convertAssertionErrorsToExceptions = true, $throwAssertionExceptions = false)
	{
		$this->convertAssertionErrorsToExceptions = $convertAssertionErrorsToExceptions;
		$this->throwAssertionExceptions = $throwAssertionExceptions;

		if ($throwAssertionExceptions && !$convertAssertionErrorsToExceptions) {
			throw $this->newException('Cannot throw assertion exceptions as assertion errors are not being converted to exceptions!');
		}

		return assert_options(ASSERT_CALLBACK, array($this, 'assertionHandler'));
	}

	/**
	 * FirePHP's assertion handler
	 *
	 * Logs all assertions to your firebug console and then stops the script.
	 *
	 * @param string $file File source of assertion
	 * @param int    $line Line source of assertion
	 * @param mixed  $code Assertion code
	 */
	public function assertionHandler($file, $line, $code)
	{
		if ($this->convertAssertionErrorsToExceptions) {

			$exception = new ErrorException('Assertion Failed - Code[ '.$code.' ]', 0, null, $file, $line);

			if ($this->throwAssertionExceptions) {
				throw $exception;
			} else {
				$this->fb($exception);
			}

		} else {
			$this->fb($code, 'Assertion Failed', FirePHP::ERROR, array('File'=>$file,'Line'=>$line));
		}
	}

	/**
	 * Start a group for following messages.
	 *
	 * Options:
	 *   Collapsed: [true|false]
	 *   Color:     [#RRGGBB|ColorName]
	 *
	 * @param string $Name
	 * @param array $Options OPTIONAL Instructions on how to log the group
	 * @return true
	 * @throws Exception
	 */
	public function group($Name, $Options = null)
	{

		if (!$Name) {
			throw $this->newException('You must specify a label for the group!');
		}

		if ($Options) {
			if (!is_array($Options)) {
				throw $this->newException('Options must be defined as an array!');
			}
			if (array_key_exists('Collapsed', $Options)) {
				$Options['Collapsed'] = ($Options['Collapsed'])?'true':'false';
			}
		}

		return $this->fb(null, $Name, FirePHP::GROUP_START, $Options);
	}

	/**
	 * Ends a group you have started before
	 *
	 * @return true
	 * @throws Exception
	 */
	public function groupEnd()
	{
		return $this->fb(null, null, FirePHP::GROUP_END);
	}

	/**
	 * Log object with label to firebug console
	 *
	 * @see FirePHP::LOG
	 * @param mixes $Object
	 * @param string $Label
	 * @return true
	 * @throws Exception
	 */
	public function log($Object, $Label = null, $Options = array())
	{
		return $this->fb($Object, $Label, FirePHP::LOG, $Options);
	}

	/**
	 * Log object with label to firebug console
	 *
	 * @see FirePHP::INFO
	 * @param mixes $Object
	 * @param string $Label
	 * @return true
	 * @throws Exception
	 */
	public function info($Object, $Label = null, $Options = array())
	{
		return $this->fb($Object, $Label, FirePHP::INFO, $Options);
	}

	/**
	 * Log object with label to firebug console
	 *
	 * @see FirePHP::WARN
	 * @param mixes $Object
	 * @param string $Label
	 * @return true
	 * @throws Exception
	 */
	public function warn($Object, $Label = null, $Options = array())
	{
		return $this->fb($Object, $Label, FirePHP::WARN, $Options);
	}

	/**
	 * Log object with label to firebug console
	 *
	 * @see FirePHP::ERROR
	 * @param mixes $Object
	 * @param string $Label
	 * @return true
	 * @throws Exception
	 */
	public function error($Object, $Label = null, $Options = array())
	{
		return $this->fb($Object, $Label, FirePHP::ERROR, $Options);
	}

	/**
	 * Dumps key and variable to firebug server panel
	 *
	 * @see FirePHP::DUMP
	 * @param string $Key
	 * @param mixed $Variable
	 * @return true
	 * @throws Exception
	 */
	public function dump($Key, $Variable, $Options = array())
	{
		if (!is_string($Key)) {
			throw $this->newException('Key passed to dump() is not a string');
		}
		if (strlen($Key)>100) {
			throw $this->newException('Key passed to dump() is longer than 100 characters');
		}
		if (!preg_match_all('/^[a-zA-Z0-9-_\.:]*$/', $Key, $m)) {
			throw $this->newException('Key passed to dump() contains invalid characters [a-zA-Z0-9-_\.:]');
		}
		return $this->fb($Variable, $Key, FirePHP::DUMP, $Options);
	}

	/**
	 * Log a trace in the firebug console
	 *
	 * @see FirePHP::TRACE
	 * @param string $Label
	 * @return true
	 * @throws Exception
	 */
	public function trace($Label)
	{
		return $this->fb($Label, FirePHP::TRACE);
	}

	/**
	 * Log a table in the firebug console
	 *
	 * @see FirePHP::TABLE
	 * @param string $Label
	 * @param string $Table
	 * @return true
	 * @throws Exception
	 */
	public function table($Label, $Table, $Options = array())
	{
		return $this->fb($Table, $Label, FirePHP::TABLE, $Options);
	}

	/**
	 * Insight API wrapper
	 *
	 * @see Insight_Helper::to()
	 */
	public static function to()
	{
		$instance = self::getInstance();
		if (!method_exists($instance, "_to")) {
			throw new Exception("FirePHP::to() implementation not loaded");
		}
		$args = func_get_args();
		return call_user_func_array(array($instance, '_to'), $args);
	}

	/**
	 * Insight API wrapper
	 *
	 * @see Insight_Helper::plugin()
	 */
	public static function plugin()
	{
		$instance = self::getInstance();
		if (!method_exists($instance, "_plugin")) {
			throw new Exception("FirePHP::plugin() implementation not loaded");
		}
		$args = func_get_args();
		return call_user_func_array(array($instance, '_plugin'), $args);
	}

	/**
	 * Check if FirePHP is installed on client
	 *
	 * @return boolean
	 */
	public function detectClientExtension()
	{
		// Check if FirePHP is installed on client via User-Agent header
		if (@preg_match_all('/\sFirePHP\/([\.\d]*)\s?/si',$this->getUserAgent(),$m) &&
		version_compare($m[1][0],'0.0.6','>=')) {
			return true;
		} else
		// Check if FirePHP is installed on client via X-FirePHP-Version header
		if (@preg_match_all('/^([\.\d]*)$/si',$this->getRequestHeader("X-FirePHP-Version"),$m) &&
		version_compare($m[1][0],'0.0.6','>=')) {
			return true;
		}
		return false;
	}

	/**
	 * Log varible to Firebug
	 *
	 * @see http://www.firephp.org/Wiki/Reference/Fb
	 * @param mixed $Object The variable to be logged
	 * @return true Return TRUE if message was added to headers, FALSE otherwise
	 * @throws Exception
	 */
	public function fb($Object)
	{
		if($this instanceof FirePHP_Insight && method_exists($this, '_logUpgradeClientMessage')) {
			if(!FirePHP_Insight::$upgradeClientMessageLogged) {    // avoid infinite recursion as _logUpgradeClientMessage() logs a message
				$this->_logUpgradeClientMessage();
			}
		}

		static $insightGroupStack = array();

		if (!$this->getEnabled()) {
			return false;
		}

		if ($this->headersSent($filename, $linenum)) {
			// If we are logging from within the exception handler we cannot throw another exception
			if ($this->inExceptionHandler) {
				// Simply echo the error out to the page
				echo '<div style="border: 2px solid red; font-family: Arial; font-size: 12px; background-color: lightgray; padding: 5px;"><span style="color: red; font-weight: bold;">FirePHP ERROR:</span> Headers already sent in <b>'.$filename.'</b> on line <b>'.$linenum.'</b>. Cannot send log data to FirePHP. You must have Output Buffering enabled via ob_start() or output_buffering ini directive.</div>';
			} else {
				throw $this->newException('Headers already sent in '.$filename.' on line '.$linenum.'. Cannot send log data to FirePHP. You must have Output Buffering enabled via ob_start() or output_buffering ini directive.');
			}
		}

		$Type = null;
		$Label = null;
		$Options = array();

		if (func_num_args()==1) {
		} else
		if (func_num_args()==2) {
			switch(func_get_arg(1)) {
				case self::LOG:
				case self::INFO:
				case self::WARN:
				case self::ERROR:
				case self::DUMP:
				case self::TRACE:
				case self::EXCEPTION:
				case self::TABLE:
				case self::GROUP_START:
				case self::GROUP_END:
					$Type = func_get_arg(1);
					break;
				default:
					$Label = func_get_arg(1);
					break;
			}
		} else
		if (func_num_args()==3) {
			$Type = func_get_arg(2);
			$Label = func_get_arg(1);
		} else
		if (func_num_args()==4) {
			$Type = func_get_arg(2);
			$Label = func_get_arg(1);
			$Options = func_get_arg(3);
		} else {
			throw $this->newException('Wrong number of arguments to fb() function!');
		}

		if($this->logToInsightConsole!==null && (get_class($this)=='FirePHP_Insight' || is_subclass_of($this, 'FirePHP_Insight'))) {
			$msg = $this->logToInsightConsole;
			if ($Object instanceof Exception) {
				$Type = self::EXCEPTION;
			}
			if($Label && $Type!=self::TABLE && $Type!=self::GROUP_START) {
				$msg = $msg->label($Label);
			}
			switch($Type) {
				case self::DUMP:
				case self::LOG:
					return $msg->log($Object);
				case self::INFO:
					return $msg->info($Object);
				case self::WARN:
					return $msg->warn($Object);
				case self::ERROR:
					return $msg->error($Object);
				case self::TRACE:
					return $msg->trace($Object);
				case self::EXCEPTION:
					return $this->plugin('engine')->handleException($Object, $msg);
				case self::TABLE:
					if (isset($Object[0]) && !is_string($Object[0]) && $Label) {
						$Object = array($Label, $Object);
					}
					return $msg->table($Object[0], array_slice($Object[1],1), $Object[1][0]);
				case self::GROUP_START:
					$insightGroupStack[] = $msg->group(md5($Label))->open();
					return $msg->log($Label);
				case self::GROUP_END:
					if(count($insightGroupStack)==0) {
						throw new Error('Too many groupEnd() as opposed to group() calls!');
					}
					$group = array_pop($insightGroupStack);
					return $group->close();
				default:
					return $msg->log($Object);
			}
		}

		if (!$this->detectClientExtension()) {
			return false;
		}

		$meta = array();
		$skipFinalObjectEncode = false;

		if ($Object instanceof Exception) {

			$meta['file'] = $this->_escapeTraceFile($Object->getFile());
			$meta['line'] = $Object->getLine();

			$trace = $Object->getTrace();
			if ($Object instanceof ErrorException
			&& isset($trace[0]['function'])
			&& $trace[0]['function']=='errorHandler'
			&& isset($trace[0]['class'])
			&& $trace[0]['class']=='FirePHP') {
				 
				$severity = false;
				switch($Object->getSeverity()) {
					case E_WARNING: $severity = 'E_WARNING'; break;
					case E_NOTICE: $severity = 'E_NOTICE'; break;
					case E_USER_ERROR: $severity = 'E_USER_ERROR'; break;
					case E_USER_WARNING: $severity = 'E_USER_WARNING'; break;
					case E_USER_NOTICE: $severity = 'E_USER_NOTICE'; break;
					case E_STRICT: $severity = 'E_STRICT'; break;
					case E_RECOVERABLE_ERROR: $severity = 'E_RECOVERABLE_ERROR'; break;
					case E_DEPRECATED: $severity = 'E_DEPRECATED'; break;
					case E_USER_DEPRECATED: $severity = 'E_USER_DEPRECATED'; break;
				}
				 
				$Object = array('Class'=>get_class($Object),
                                'Message'=>$severity.': '.$Object->getMessage(),
                                'File'=>$this->_escapeTraceFile($Object->getFile()),
                                'Line'=>$Object->getLine(),
                                'Type'=>'trigger',
                                'Trace'=>$this->_escapeTrace(array_splice($trace,2)));
				$skipFinalObjectEncode = true;
			} else {
				$Object = array('Class'=>get_class($Object),
                                'Message'=>$Object->getMessage(),
                                'File'=>$this->_escapeTraceFile($Object->getFile()),
                                'Line'=>$Object->getLine(),
                                'Type'=>'throw',
                                'Trace'=>$this->_escapeTrace($trace));
				$skipFinalObjectEncode = true;
			}
			$Type = self::EXCEPTION;

		} else
		if ($Type==self::TRACE) {

			$trace = debug_backtrace();
			if (!$trace) return false;
			for( $i=0 ; $i<sizeof($trace) ; $i++ ) {

				if (isset($trace[$i]['class'])
				&& isset($trace[$i]['file'])
				&& ($trace[$i]['class']=='FirePHP'
				|| $trace[$i]['class']=='FB')
				&& (substr($this->_standardizePath($trace[$i]['file']),-18,18)=='FirePHPCore/fb.php'
				|| substr($this->_standardizePath($trace[$i]['file']),-29,29)=='FirePHPCore/FirePHP.class.php')) {
					/* Skip - FB::trace(), FB::send(), $firephp->trace(), $firephp->fb() */
				} else
				if (isset($trace[$i]['class'])
				&& isset($trace[$i+1]['file'])
				&& $trace[$i]['class']=='FirePHP'
				&& substr($this->_standardizePath($trace[$i+1]['file']),-18,18)=='FirePHPCore/fb.php') {
					/* Skip fb() */
				} else
				if ($trace[$i]['function']=='fb'
				|| $trace[$i]['function']=='trace'
				|| $trace[$i]['function']=='send') {

					$Object = array('Class'=>isset($trace[$i]['class'])?$trace[$i]['class']:'',
                                    'Type'=>isset($trace[$i]['type'])?$trace[$i]['type']:'',
                                    'Function'=>isset($trace[$i]['function'])?$trace[$i]['function']:'',
                                    'Message'=>$trace[$i]['args'][0],
                                    'File'=>isset($trace[$i]['file'])?$this->_escapeTraceFile($trace[$i]['file']):'',
                                    'Line'=>isset($trace[$i]['line'])?$trace[$i]['line']:'',
                                    'Args'=>isset($trace[$i]['args'])?$this->encodeObject($trace[$i]['args']):'',
                                    'Trace'=>$this->_escapeTrace(array_splice($trace,$i+1)));

					$skipFinalObjectEncode = true;
					$meta['file'] = isset($trace[$i]['file'])?$this->_escapeTraceFile($trace[$i]['file']):'';
					$meta['line'] = isset($trace[$i]['line'])?$trace[$i]['line']:'';
					break;
				}
			}

		} else
		if ($Type==self::TABLE) {

			if (isset($Object[0]) && is_string($Object[0])) {
				$Object[1] = $this->encodeTable($Object[1]);
			} else {
				$Object = $this->encodeTable($Object);
			}

			$skipFinalObjectEncode = true;

		} else
		if ($Type==self::GROUP_START) {

			if (!$Label) {
				throw $this->newException('You must specify a label for the group!');
			}

		} else {
			if ($Type===null) {
				$Type = self::LOG;
			}
		}

		if ($this->options['includeLineNumbers']) {
			if (!isset($meta['file']) || !isset($meta['line'])) {

				$trace = debug_backtrace();
				for( $i=0 ; $trace && $i<sizeof($trace) ; $i++ ) {

					if (isset($trace[$i]['class'])
					&& isset($trace[$i]['file'])
					&& ($trace[$i]['class']=='FirePHP'
					|| $trace[$i]['class']=='FB')
					&& (substr($this->_standardizePath($trace[$i]['file']),-18,18)=='FirePHPCore/fb.php'
					|| substr($this->_standardizePath($trace[$i]['file']),-29,29)=='FirePHPCore/FirePHP.class.php')) {
						/* Skip - FB::trace(), FB::send(), $firephp->trace(), $firephp->fb() */
					} else
					if (isset($trace[$i]['class'])
					&& isset($trace[$i+1]['file'])
					&& $trace[$i]['class']=='FirePHP'
					&& substr($this->_standardizePath($trace[$i+1]['file']),-18,18)=='FirePHPCore/fb.php') {
						/* Skip fb() */
					} else
					if (isset($trace[$i]['file'])
					&& substr($this->_standardizePath($trace[$i]['file']),-18,18)=='FirePHPCore/fb.php') {
						/* Skip FB::fb() */
					} else {
						$meta['file'] = isset($trace[$i]['file'])?$this->_escapeTraceFile($trace[$i]['file']):'';
						$meta['line'] = isset($trace[$i]['line'])?$trace[$i]['line']:'';
						break;
					}
				}
			}
		} else {
			unset($meta['file']);
			unset($meta['line']);
		}

		$this->setHeader('X-Wf-Protocol-1','http://meta.wildfirehq.org/Protocol/JsonStream/0.2');
		$this->setHeader('X-Wf-1-Plugin-1','http://meta.firephp.org/Wildfire/Plugin/FirePHP/Library-FirePHPCore/'.self::VERSION);
		 
		$structure_index = 1;
		if ($Type==self::DUMP) {
			$structure_index = 2;
			$this->setHeader('X-Wf-1-Structure-2','http://meta.firephp.org/Wildfire/Structure/FirePHP/Dump/0.1');
		} else {
			$this->setHeader('X-Wf-1-Structure-1','http://meta.firephp.org/Wildfire/Structure/FirePHP/FirebugConsole/0.1');
		}

		if ($Type==self::DUMP) {
			$msg = '{"'.$Label.'":'.$this->jsonEncode($Object, $skipFinalObjectEncode).'}';
		} else {
			$msg_meta = $Options;
			$msg_meta['Type'] = $Type;
			if ($Label!==null) {
				$msg_meta['Label'] = $Label;
			}
			if (isset($meta['file']) && !isset($msg_meta['File'])) {
				$msg_meta['File'] = $meta['file'];
			}
			if (isset($meta['line']) && !isset($msg_meta['Line'])) {
				$msg_meta['Line'] = $meta['line'];
			}
			$msg = '['.$this->jsonEncode($msg_meta).','.$this->jsonEncode($Object, $skipFinalObjectEncode).']';
		}

		$parts = explode("\n",chunk_split($msg, 5000, "\n"));

		for( $i=0 ; $i<count($parts) ; $i++) {

			$part = $parts[$i];
			if ($part) {

				if (count($parts)>2) {
					// Message needs to be split into multiple parts
					$this->setHeader('X-Wf-1-'.$structure_index.'-'.'1-'.$this->messageIndex,
					(($i==0)?strlen($msg):'')
					. '|' . $part . '|'
					. (($i<count($parts)-2)?'\\':''));
				} else {
					$this->setHeader('X-Wf-1-'.$structure_index.'-'.'1-'.$this->messageIndex,
					strlen($part) . '|' . $part . '|');
				}

				$this->messageIndex++;

				if ($this->messageIndex > 99999) {
					throw $this->newException('Maximum number (99,999) of messages reached!');
				}
			}
		}

		$this->setHeader('X-Wf-1-Index',$this->messageIndex-1);

		return true;
	}

	/**
	 * Standardizes path for windows systems.
	 *
	 * @param string $Path
	 * @return string
	 */
	protected function _standardizePath($Path)
	{
		return preg_replace('/\\\\+/','/',$Path);
	}

	/**
	 * Escape trace path for windows systems
	 *
	 * @param array $Trace
	 * @return array
	 */
	protected function _escapeTrace($Trace)
	{
		if (!$Trace) return $Trace;
		for( $i=0 ; $i<sizeof($Trace) ; $i++ ) {
			if (isset($Trace[$i]['file'])) {
				$Trace[$i]['file'] = $this->_escapeTraceFile($Trace[$i]['file']);
			}
			if (isset($Trace[$i]['args'])) {
				$Trace[$i]['args'] = $this->encodeObject($Trace[$i]['args']);
			}
		}
		return $Trace;
	}

	/**
	 * Escape file information of trace for windows systems
	 *
	 * @param string $File
	 * @return string
	 */
	protected function _escapeTraceFile($File)
	{
		/* Check if we have a windows filepath */
		if (strpos($File,'\\')) {
			/* First strip down to single \ */

			$file = preg_replace('/\\\\+/','\\',$File);

			return $file;
		}
		return $File;
	}

	/**
	 * Check if headers have already been sent
	 *
	 * @param string $Filename
	 * @param integer $Linenum
	 */
	protected function headersSent(&$Filename, &$Linenum)
	{
		return headers_sent($Filename, $Linenum);
	}

	/**
	 * Send header
	 *
	 * @param string $Name
	 * @param string $Value
	 */
	protected function setHeader($Name, $Value)
	{
		return header($Name.': '.$Value);
	}

	/**
	 * Get user agent
	 *
	 * @return string|false
	 */
	protected function getUserAgent()
	{
		if (!isset($_SERVER['HTTP_USER_AGENT'])) return false;
		return $_SERVER['HTTP_USER_AGENT'];
	}

	/**
	 * Get all request headers
	 *
	 * @return array
	 */
	public static function getAllRequestHeaders() {
		static $_cached_headers = false;
		if($_cached_headers!==false) {
			return $_cached_headers;
		}
		$headers = array();
		if(function_exists('getallheaders')) {
			foreach( getallheaders() as $name => $value ) {
				$headers[strtolower($name)] = $value;
			}
		} else {
			foreach($_SERVER as $name => $value) {
				if(substr($name, 0, 5) == 'HTTP_') {
					$headers[strtolower(str_replace(' ', '-', str_replace('_', ' ', substr($name, 5))))] = $value;
				}
			}
		}
		return $_cached_headers = $headers;
	}

	/**
	 * Get a request header
	 *
	 * @return string|false
	 */
	protected function getRequestHeader($Name)
	{
		$headers = self::getAllRequestHeaders();
		if (isset($headers[strtolower($Name)])) {
			return $headers[strtolower($Name)];
		}
		return false;
	}

	/**
	 * Returns a new exception
	 *
	 * @param string $Message
	 * @return Exception
	 */
	protected function newException($Message)
	{
		return new Exception($Message);
	}

	/**
	 * Encode an object into a JSON string
	 *
	 * Uses PHP's jeson_encode() if available
	 *
	 * @param object $Object The object to be encoded
	 * @return string The JSON string
	 */
	public function jsonEncode($Object, $skipObjectEncode = false)
	{
		if (!$skipObjectEncode) {
			$Object = $this->encodeObject($Object);
		}

		if (function_exists('json_encode')
		&& $this->options['useNativeJsonEncode']!=false) {

			return json_encode($Object);
		} else {
			return $this->json_encode($Object);
		}
	}

	/**
	 * Encodes a table by encoding each row and column with encodeObject()
	 *
	 * @param array $Table The table to be encoded
	 * @return array
	 */
	protected function encodeTable($Table)
	{

		if (!$Table) return $Table;

		$new_table = array();
		foreach($Table as $row) {

			if (is_array($row)) {
				$new_row = array();

				foreach($row as $item) {
					$new_row[] = $this->encodeObject($item);
				}

				$new_table[] = $new_row;
			}
		}

		return $new_table;
	}

	/**
	 * Encodes an object including members with
	 * protected and private visibility
	 *
	 * @param Object $Object The object to be encoded
	 * @param int $Depth The current traversal depth
	 * @return array All members of the object
	 */
	protected function encodeObject($Object, $ObjectDepth = 1, $ArrayDepth = 1, $MaxDepth = 1)
	{
		if ($MaxDepth > $this->options['maxDepth']) {
			return '** Max Depth ('.$this->options['maxDepth'].') **';
		}

		$return = array();

		if (is_resource($Object)) {

			return '** '.(string)$Object.' **';

		} else
		if (is_object($Object)) {

			if ($ObjectDepth > $this->options['maxObjectDepth']) {
				return '** Max Object Depth ('.$this->options['maxObjectDepth'].') **';
			}

			foreach ($this->objectStack as $refVal) {
				if ($refVal === $Object) {
					return '** Recursion ('.get_class($Object).') **';
				}
			}
			array_push($this->objectStack, $Object);

			$return['__className'] = $class = get_class($Object);
			$class_lower = strtolower($class);

			$reflectionClass = new ReflectionClass($class);
			$properties = array();
			foreach( $reflectionClass->getProperties() as $property) {
				$properties[$property->getName()] = $property;
			}

			$members = (array)$Object;

			foreach( $properties as $plain_name => $property ) {

				$name = $raw_name = $plain_name;
				if ($property->isStatic()) {
					$name = 'static:'.$name;
				}
				if ($property->isPublic()) {
					$name = 'public:'.$name;
				} else
				if ($property->isPrivate()) {
					$name = 'private:'.$name;
					$raw_name = "\0".$class."\0".$raw_name;
				} else
				if ($property->isProtected()) {
					$name = 'protected:'.$name;
					$raw_name = "\0".'*'."\0".$raw_name;
				}

				if (!(isset($this->objectFilters[$class_lower])
				&& is_array($this->objectFilters[$class_lower])
				&& in_array($plain_name,$this->objectFilters[$class_lower]))) {

					if (array_key_exists($raw_name,$members)
					&& !$property->isStatic()) {

						$return[$name] = $this->encodeObject($members[$raw_name], $ObjectDepth + 1, 1, $MaxDepth + 1);

					} else {
						if (method_exists($property,'setAccessible')) {
							$property->setAccessible(true);
							$return[$name] = $this->encodeObject($property->getValue($Object), $ObjectDepth + 1, 1, $MaxDepth + 1);
						} else
						if ($property->isPublic()) {
							$return[$name] = $this->encodeObject($property->getValue($Object), $ObjectDepth + 1, 1, $MaxDepth + 1);
						} else {
							$return[$name] = '** Need PHP 5.3 to get value **';
						}
					}
				} else {
					$return[$name] = '** Excluded by Filter **';
				}
			}

			// Include all members that are not defined in the class
			// but exist in the object
			foreach( $members as $raw_name => $value ) {

				$name = $raw_name;

				if ($name{0} == "\0") {
					$parts = explode("\0", $name);
					$name = $parts[2];
				}

				$plain_name = $name;

				if (!isset($properties[$name])) {
					$name = 'undeclared:'.$name;

					if (!(isset($this->objectFilters[$class_lower])
					&& is_array($this->objectFilters[$class_lower])
					&& in_array($plain_name,$this->objectFilters[$class_lower]))) {

						$return[$name] = $this->encodeObject($value, $ObjectDepth + 1, 1, $MaxDepth + 1);
					} else {
						$return[$name] = '** Excluded by Filter **';
					}
				}
			}

			array_pop($this->objectStack);

		} elseif (is_array($Object)) {

			if ($ArrayDepth > $this->options['maxArrayDepth']) {
				return '** Max Array Depth ('.$this->options['maxArrayDepth'].') **';
			}

			foreach ($Object as $key => $val) {

				// Encoding the $GLOBALS PHP array causes an infinite loop
				// if the recursion is not reset here as it contains
				// a reference to itself. This is the only way I have come up
				// with to stop infinite recursion in this case.
				if ($key=='GLOBALS'
				&& is_array($val)
				&& array_key_exists('GLOBALS',$val)) {
					$val['GLOBALS'] = '** Recursion (GLOBALS) **';
				}

				$return[$key] = $this->encodeObject($val, 1, $ArrayDepth + 1, $MaxDepth + 1);
			}
		} else {
			if (self::is_utf8($Object)) {
				return $Object;
			} else {
				return utf8_encode($Object);
			}
		}
		return $return;
	}

	/**
	 * Returns true if $string is valid UTF-8 and false otherwise.
	 *
	 * @param mixed $str String to be tested
	 * @return boolean
	 */
	protected static function is_utf8($str)
	{
		if(function_exists('mb_detect_encoding')) {
			return (mb_detect_encoding($str) == 'UTF-8');
		}
		$c=0; $b=0;
		$bits=0;
		$len=strlen($str);
		for($i=0; $i<$len; $i++){
			$c=ord($str[$i]);
			if ($c > 128){
				if (($c >= 254)) return false;
				elseif ($c >= 252) $bits=6;
				elseif ($c >= 248) $bits=5;
				elseif ($c >= 240) $bits=4;
				elseif ($c >= 224) $bits=3;
				elseif ($c >= 192) $bits=2;
				else return false;
				if (($i+$bits) > $len) return false;
				while($bits > 1){
					$i++;
					$b=ord($str[$i]);
					if ($b < 128 || $b > 191) return false;
					$bits--;
				}
			}
		}
		return true;
	}

	/**
	 * Converts to and from JSON format.
	 *
	 * JSON (JavaScript Object Notation) is a lightweight data-interchange
	 * format. It is easy for humans to read and write. It is easy for machines
	 * to parse and generate. It is based on a subset of the JavaScript
	 * Programming Language, Standard ECMA-262 3rd Edition - December 1999.
	 * This feature can also be found in  Python. JSON is a text format that is
	 * completely language independent but uses conventions that are familiar
	 * to programmers of the C-family of languages, including C, C++, C#, Java,
	 * JavaScript, Perl, TCL, and many others. These properties make JSON an
	 * ideal data-interchange language.
	 *
	 * This package provides a simple encoder and decoder for JSON notation. It
	 * is intended for use with client-side Javascript applications that make
	 * use of HTTPRequest to perform server communication functions - data can
	 * be encoded into JSON notation for use in a client-side javascript, or
	 * decoded from incoming Javascript requests. JSON format is native to
	 * Javascript, and can be directly eval()'ed with no further parsing
	 * overhead
	 *
	 * All strings should be in ASCII or UTF-8 format!
	 *
	 * LICENSE: Redistribution and use in source and binary forms, with or
	 * without modification, are permitted provided that the following
	 * conditions are met: Redistributions of source code must retain the
	 * above copyright notice, this list of conditions and the following
	 * disclaimer. Redistributions in binary form must reproduce the above
	 * copyright notice, this list of conditions and the following disclaimer
	 * in the documentation and/or other materials provided with the
	 * distribution.
	 *
	 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
	 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
	 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
	 * NO EVENT SHALL CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
	 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
	 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
	 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
	 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
	 * TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
	 * USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
	 * DAMAGE.
	 *
	 * @category
	 * @package     Services_JSON
	 * @author      Michal Migurski <mike-json@teczno.com>
	 * @author      Matt Knapp <mdknapp[at]gmail[dot]com>
	 * @author      Brett Stimmerman <brettstimmerman[at]gmail[dot]com>
	 * @author      Christoph Dorn <christoph@christophdorn.com>
	 * @copyright   2005 Michal Migurski
	 * @version     CVS: $Id: JSON.php,v 1.31 2006/06/28 05:54:17 migurski Exp $
	 * @license     http://www.opensource.org/licenses/bsd-license.php
	 * @link        http://pear.php.net/pepr/pepr-proposal-show.php?id=198
	 */
	 
	 
	/**
	 * Keep a list of objects as we descend into the array so we can detect recursion.
	 */
	private $json_objectStack = array();


	/**
	 * convert a string from one UTF-8 char to one UTF-16 char
	 *
	 * Normally should be handled by mb_convert_encoding, but
	 * provides a slower PHP-only method for installations
	 * that lack the multibye string extension.
	 *
	 * @param    string  $utf8   UTF-8 character
	 * @return   string  UTF-16 character
	 * @access   private
	 */
	private function json_utf82utf16($utf8)
	{
		// oh please oh please oh please oh please oh please
		if (function_exists('mb_convert_encoding')) {
			return mb_convert_encoding($utf8, 'UTF-16', 'UTF-8');
		}

		switch(strlen($utf8)) {
			case 1:
				// this case should never be reached, because we are in ASCII range
				// see: http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8
				return $utf8;

			case 2:
				// return a UTF-16 character from a 2-byte UTF-8 char
				// see: http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8
				return chr(0x07 & (ord($utf8{0}) >> 2))
				. chr((0xC0 & (ord($utf8{0}) << 6))
				| (0x3F & ord($utf8{1})));

			case 3:
				// return a UTF-16 character from a 3-byte UTF-8 char
				// see: http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8
				return chr((0xF0 & (ord($utf8{0}) << 4))
				| (0x0F & (ord($utf8{1}) >> 2)))
				. chr((0xC0 & (ord($utf8{1}) << 6))
				| (0x7F & ord($utf8{2})));
		}

		// ignoring UTF-32 for now, sorry
		return '';
	}

	/**
	 * encodes an arbitrary variable into JSON format
	 *
	 * @param    mixed   $var    any number, boolean, string, array, or object to be encoded.
	 *                           see argument 1 to Services_JSON() above for array-parsing behavior.
	 *                           if var is a strng, note that encode() always expects it
	 *                           to be in ASCII or UTF-8 format!
	 *
	 * @return   mixed   JSON string representation of input var or an error if a problem occurs
	 * @access   public
	 */
	private function json_encode($var)
	{

		if (is_object($var)) {
			if (in_array($var,$this->json_objectStack)) {
				return '"** Recursion **"';
			}
		}

		switch (gettype($var)) {
			case 'boolean':
				return $var ? 'true' : 'false';

			case 'NULL':
				return 'null';

			case 'integer':
				return (int) $var;

			case 'double':
			case 'float':
				return (float) $var;

			case 'string':
				// STRINGS ARE EXPECTED TO BE IN ASCII OR UTF-8 FORMAT
				$ascii = '';
				$strlen_var = strlen($var);

				/*
				 * Iterate over every character in the string,
				 * escaping with a slash or encoding to UTF-8 where necessary
				 */
				for ($c = 0; $c < $strlen_var; ++$c) {

					$ord_var_c = ord($var{$c});

					switch (true) {
						case $ord_var_c == 0x08:
							$ascii .= '\b';
							break;
						case $ord_var_c == 0x09:
							$ascii .= '\t';
							break;
						case $ord_var_c == 0x0A:
							$ascii .= '\n';
							break;
						case $ord_var_c == 0x0C:
							$ascii .= '\f';
							break;
						case $ord_var_c == 0x0D:
							$ascii .= '\r';
							break;

						case $ord_var_c == 0x22:
						case $ord_var_c == 0x2F:
						case $ord_var_c == 0x5C:
							// double quote, slash, slosh
							$ascii .= '\\'.$var{$c};
							break;

						case (($ord_var_c >= 0x20) && ($ord_var_c <= 0x7F)):
							// characters U-00000000 - U-0000007F (same as ASCII)
							$ascii .= $var{$c};
							break;

						case (($ord_var_c & 0xE0) == 0xC0):
							// characters U-00000080 - U-000007FF, mask 110XXXXX
							// see http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8
							$char = pack('C*', $ord_var_c, ord($var{$c + 1}));
							$c += 1;
							$utf16 = $this->json_utf82utf16($char);
							$ascii .= sprintf('\u%04s', bin2hex($utf16));
							break;

						case (($ord_var_c & 0xF0) == 0xE0):
							// characters U-00000800 - U-0000FFFF, mask 1110XXXX
							// see http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8
							$char = pack('C*', $ord_var_c,
							ord($var{$c + 1}),
							ord($var{$c + 2}));
							$c += 2;
							$utf16 = $this->json_utf82utf16($char);
							$ascii .= sprintf('\u%04s', bin2hex($utf16));
							break;

						case (($ord_var_c & 0xF8) == 0xF0):
							// characters U-00010000 - U-001FFFFF, mask 11110XXX
							// see http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8
							$char = pack('C*', $ord_var_c,
							ord($var{$c + 1}),
							ord($var{$c + 2}),
							ord($var{$c + 3}));
							$c += 3;
							$utf16 = $this->json_utf82utf16($char);
							$ascii .= sprintf('\u%04s', bin2hex($utf16));
							break;

						case (($ord_var_c & 0xFC) == 0xF8):
							// characters U-00200000 - U-03FFFFFF, mask 111110XX
							// see http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8
							$char = pack('C*', $ord_var_c,
							ord($var{$c + 1}),
							ord($var{$c + 2}),
							ord($var{$c + 3}),
							ord($var{$c + 4}));
							$c += 4;
							$utf16 = $this->json_utf82utf16($char);
							$ascii .= sprintf('\u%04s', bin2hex($utf16));
							break;

						case (($ord_var_c & 0xFE) == 0xFC):
							// characters U-04000000 - U-7FFFFFFF, mask 1111110X
							// see http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8
							$char = pack('C*', $ord_var_c,
							ord($var{$c + 1}),
							ord($var{$c + 2}),
							ord($var{$c + 3}),
							ord($var{$c + 4}),
							ord($var{$c + 5}));
							$c += 5;
							$utf16 = $this->json_utf82utf16($char);
							$ascii .= sprintf('\u%04s', bin2hex($utf16));
							break;
					}
				}

				return '"'.$ascii.'"';

			case 'array':
				/*
				 * As per JSON spec if any array key is not an integer
				 * we must treat the the whole array as an object. We
				 * also try to catch a sparsely populated associative
				 * array with numeric keys here because some JS engines
				 * will create an array with empty indexes up to
				 * max_index which can cause memory issues and because
				 * the keys, which may be relevant, will be remapped
				 * otherwise.
				 *
				 * As per the ECMA and JSON specification an object may
				 * have any string as a property. Unfortunately due to
				 * a hole in the ECMA specification if the key is a
				 * ECMA reserved word or starts with a digit the
				 * parameter is only accessible using ECMAScript's
				 * bracket notation.
				 */

				// treat as a JSON object
				if (is_array($var) && count($var) && (array_keys($var) !== range(0, sizeof($var) - 1))) {

					$this->json_objectStack[] = $var;

					$properties = array_map(array($this, 'json_name_value'),
					array_keys($var),
					array_values($var));

					array_pop($this->json_objectStack);

					foreach($properties as $property) {
						if ($property instanceof Exception) {
							return $property;
						}
					}

					return '{' . join(',', $properties) . '}';
				}

				$this->json_objectStack[] = $var;

				// treat it like a regular array
				$elements = array_map(array($this, 'json_encode'), $var);

				array_pop($this->json_objectStack);

				foreach($elements as $element) {
					if ($element instanceof Exception) {
						return $element;
					}
				}

				return '[' . join(',', $elements) . ']';

			case 'object':
				$vars = self::encodeObject($var);

				$this->json_objectStack[] = $var;

				$properties = array_map(array($this, 'json_name_value'),
				array_keys($vars),
				array_values($vars));

				array_pop($this->json_objectStack);

				foreach($properties as $property) {
					if ($property instanceof Exception) {
						return $property;
					}
				}
				 
				return '{' . join(',', $properties) . '}';

			default:
				return null;
		}
	}

	/**
	 * array-walking function for use in generating JSON-formatted name-value pairs
	 *
	 * @param    string  $name   name of key to use
	 * @param    mixed   $value  reference to an array element to be encoded
	 *
	 * @return   string  JSON-formatted name-value pair, like '"name":value'
	 * @access   private
	 */
	private function json_name_value($name, $value)
	{
		// Encoding the $GLOBALS PHP array causes an infinite loop
		// if the recursion is not reset here as it contains
		// a reference to itself. This is the only way I have come up
		// with to stop infinite recursion in this case.
		if ($name=='GLOBALS'
		&& is_array($value)
		&& array_key_exists('GLOBALS',$value)) {
			$value['GLOBALS'] = '** Recursion **';
		}

		$encoded_value = $this->json_encode($value);

		if ($encoded_value instanceof Exception) {
			return $encoded_value;
		}

		return $this->json_encode(strval($name)) . ':' . $encoded_value;
	}

	/**
	 * @deprecated
	 */
	public function setProcessorUrl($URL)
	{
		trigger_error("The FirePHP::setProcessorUrl() method is no longer supported", E_USER_DEPRECATED);
	}

	/**
	 * @deprecated
	 */
	public function setRendererUrl($URL)
	{
		trigger_error("The FirePHP::setRendererUrl() method is no longer supported", E_USER_DEPRECATED);
	}
}